Nut-lock.



J. F. LAGHMAN.

NUT LOGI.

'APPLICATION ILED IAB. 18, 1908.

Patented Nov. 10, 1908.

Jf'ac/izvafe/ embodyingthe invention.

JOHN F. LAGHMAN, 0F WICHITA, KANSAS.

NUT-LOCK.

Specification of Letters Patent.

Patented Nov. 10,1908.

Appiicaaon mai umn is, 190s. semi No. 421,899.

To all whomit may concern:

Be it known that I, JOHN F. LAcHMAN, citizen of ,the United States, residin at Wichita, in the county of Sedgwick and tate of Kansas, have inventedcert'ain new an useful Improvements in Nut-Locks, of which the following is aspecilication.

The present invention appertains to means for preventing the loosening of nuts or burs after the saine have been tightened upon bolts, rods or like fastening means.

The invention combines with a nut orbur an eccentric having a portion adapted to match with a thread of the bolt opening of the nut and so arranged that the nut may be easily -tigl'itened upon the bolt or like part, but when turned backward the eccentric comes into ilay and binds upon the thread of the bolt, t iereby retarding or preventing backward rotation of the nut and the consequent loosening of the fastening.

For 'a full understandinv of the invention and the-merits thereof an also to acquire a knowledge of the details of construction and the means for effecting the result, reference 1s lto be had to the following description and accom an ing drawings.

Whi e t ie invention may be adapted to different formsand. conditions by changes in the structure and ininor details without departin from the spirit or essential features theieo still the preferred embodiment is shown in the accompanying drawings, in which:

Figure l is a perspective view of a nut lock Fig. 2 is a view of the nut as seen from the inner side, showing the bolt in section. Fig. 3 is a section on the line x-- of Fig. 2. Fig. 4 is a detail )erspective view of the locking eccentric. 1* 1g. 5 is a detail view of a corner portion of the nut, showing more clearly the means for holding the eccentric in normal osition.

Corresponding and li e parts are referred to in the followin description and indicated inall the views o the drawings by the same reference characters.

The bolt 1 is typical of the form of fastenmg adapted to receive a nut or bur 2, which, when tightened, is adapted to be .locked against loosening by vibratory movement or other like cause.

The nut or bur 2 may be of usual construction and is irovided with an o' ening 3 at one side of the olt opening 4 an about parallel therewith. A recess 5 is formed upon the' inner face of the nut or .bur l in line with opening 3 to receive the locking eccentricl 6. A groove 7 is formed in the outer face of the nut or bur and intersects with the opening 3. The recess 5 extends into the bolt opening 4 to admit a part of the locking eccentric 6 engaging with the thread of, the bolt 1 or like mrt. l The locking eccentric 6 has a stern 8 which is mounted in the opening 3 and constitutes a spindle for said locking eccentric. The active edgie portion of the locking eccentric is incline -to correspond approximately to the pitch of the thread of theibolt opening 4 so as to admit of the nut or bur being readily tightened upon the bolt 1. When the eccentric is free to move or tum about its axis, any backward movement of the nut oi' burafter the saine has-been tightened will cause the eccentric to bind upon the thread of the bolt and resist the backward movement of the nut and look the same to the bolt. However, should it be required to remove the nut, the eccentric is turned to normal position to disengage it from the thread of the bolt, thereby admitting of the removal of the nut. Any means may be ein tric in normal position, such for instance as a pin 9 inserted in an opening 10 formed part way in the nut and stem 8 so that the pin 9 extends across the joint formed between the stein 8 and the opening 3. A wrench or similar device may be fitted to the projecting end of the stem 8 to sergethe same purpose, or the pin 9 may beditted into the roove 7 and come between and a flattened side at the prnjctin end of the stem. When the=nut -is tiime backward, the friction between the locking eccentric 6 and the threadof the bolt issuicient to turn said eccentric and cause the sabre, to bind the thread of the bolt and securesthe nut against loosening. The `recess 5y receives the locking eccentric 6., the latter being housed therein and confined between the work against which the 'nut is clamped and the inner Wall of said recess.l The projecting end of lthe stem 8' enables the eccentric to be turned to normal position and to be secured to hold the eccentric out of action when removing the nut from the bolt.

Havi thus described the invention, what is claime as new is:

1. In combination with a nut having an interiorly threaded bolt opening, a secon opening at one side and paralleling the bolt the loyed to hold the eccenopening, a recess in its inner face in line with said second openi said nut also having a groove in its outer ace in communication at lts inner end with the bolt opening and intersecting" the said second opening, an eccentric arranged in said recess and having al portion extended into the bolt openin to form a part of the thread thereof and a apted to bind against the thread of the bolt or like part to which the nut may be fitted, said eccentric having a stem which is mounted in the aforesaid second opening, and said stem having its end' rejected beyond the outer side of the nut an having a portion cut away at one side and adapted to coperate with a fastening device to fix the position of the eccentric, when turned -to throw the eccentric out of .engagement with the thread of the bolt.

2; In combination with a nut-having an interiorly threaded bolt opening, a second opening at one side and parallellng the bolt opening, a recess inits inner face in line with said second openin ,y said nut also having a groovein its outer ace in communication at its inner end with the bolt opening and in-v tersecting the said second opening, an eccentric arranged in said recess and having a ortion extended into the bolt openi to orm a part `of the thread thereof and a apted to bind against the thread of the bolt or like,

part to which the nut may be fitted, said eccentric having a stem which is mounted in the aforesaid second opening, and said stem having its end projected beyond the outer side of the nut and having a side of the projected end cut away and having a groove m a side adjacent to said cut away portion, both the groove and cut away portion adapted to recelve and coperate with a fastening device to hold the eccentric in normal position or out of binding engagement with the threadv of the bolt.

In testimonywhereofl affix my signature in presence of two witnesses.

JOHN F. LACHMAN. 'i [L s. Witnesses: l

, R. S. ELDER,

M. A. PARKER. 

